The charges were brought by two lawyers Amro Abdelsalam and Samir Sabri, who are known for taking celebrities to court.

Ms Youssef’s appearance “did not meet societal values, traditions and morals and therefore undermined the reputation of the festival and the reputation of Egyptian women in particular”, Mr Sabri told AFP.

The Egyptian Actors’ Syndicate also criticised the “appearance of some of the guests”, which it said “undermined the festival and the union”.